JP6167083B2 - Static elimination device and static elimination method - Google Patents

Description

  The present invention is based on static electricity charged in a coaxial cable connecting between an electronic device and a device under test (DUT: Device Under Test) when performing various measurements of the device under test (DUT) using an electronic device such as a measuring instrument. The present invention relates to a static eliminator and a static eliminator for preventing damage to an electronic device.

  For measuring instruments as electronic equipment, for example, specific signal systems based on various wired communication standards such as SDH (Synchronous Digital Hierarchy), PDH (plesiochronous digital hierarchy), OTN (Optical Transport Network), Ethernet (registered trademark), etc. A device having a function of performing various measurements of an object to be measured is known. This type of measuring instrument is equipped with multiple measurement hardware and multiple measurement applications in a single device, and each measurement application controls the predetermined measurement hardware according to a certain procedure. The object is measured and the measurement result is provided to the user.

  As a measuring instrument provided with such a plurality of measurement hardware and a plurality of measurement applications in one apparatus, for example, one disclosed in Patent Document 1 below is known. The measuring instrument disclosed in Patent Document 1 is connected to a common unit in which a plurality of measurement applications of various measurement contents are stored, and a battery unit, so that a measurement unit as measurement hardware is sandwiched therebetween, respectively. The measurement unit can be added, removed and recombined according to the measurement contents.

  Further, as similar to the measuring instrument disclosed in Patent Document 1 described above, a plurality of types of measuring units are appropriately provided on one side of a housing equipped with an operation panel on the front depending on the measurement contents of the object to be measured. There is also known a measuring instrument having a configuration that can be detachably mounted in combination.

  According to the measuring instrument configured as described above, not only one measurement application controls one measurement hardware, but one measurement application controls a plurality of measurement hardware in conjunction with each other. A plurality of measurement applications can be simultaneously started and executed on the measurement apparatus, and a desired object to be measured can be measured in various forms.

  By the way, when measuring an object to be measured using the measuring instrument described above, the measuring instrument and the object to be measured are connected via a coaxial cable. In the measuring instrument to handle, there was a risk of damage to the measuring instrument due to static electricity charged on the coaxial cable. For this reason, it is necessary to neutralize static electricity charged in the coaxial cable before connecting the coaxial cable to the port of the measuring instrument.

  Thus, as a conventional static elimination device that prevents damage to the measuring instrument due to static electricity charged on the coaxial cable, for example, one disclosed in Patent Document 2 below is known. The static eliminator disclosed in Patent Document 2 has a conductive support whose first end is coupled to a device and a conductive support for the purpose of grounding the central conductor of the coaxial cable to the device having the coaxial connector. And a conductive hinge having a raised target area that is pivotally attached to the second end of the contact and contacts the central conductor. In the static eliminator disclosed in Patent Document 2, when the conductive hinge is at the first stop position, the coaxial cable is prevented from reaching the coaxial connector, and when the conductive hinge is at the second stop position, It is possible to reach the coaxial connector of the coaxial cable. That is, in the static eliminator disclosed in Patent Document 2, the conductive hinge has a raised target region that contacts the central conductor of the coaxial connector, and the coaxial cable is electrostatically charged by a turning operation that turns the conductive hinge. The charge is removed.

JP 2010-025863 A JP 2001-023792 A

  By the way, there are a plurality of types of coaxial connectors used in the measuring instrument described above depending on the frequency of the signal to be transmitted. Specifically, there are coaxial connectors such as an SMA connector, a K connector, a V connector, and a W connector. In this type of coaxial connector, the outer diameter of the central conductor becomes smaller (the order of SMA connector → K connector → V connector → W connector) and the price increases as the frequency of the signal to be transmitted increases. In particular, when connecting a measuring instrument and an object to be measured with a coaxial cable using a V connector or a W connector, which is expensive and has a small outer diameter of the central conductor, an extra portion is added to the central conductor of the coaxial connector during installation. There is a risk that the center conductor may be damaged only by the application of force, and sufficient care was required for its handling.

  When such a wide variety of coaxial connectors are properly used, and the conventional static eliminator disclosed in Patent Document 2 described above is adopted in a measuring instrument disclosed in Patent Document 1 or the like, a measurement unit to be neutralized A static eliminator is attached to the. However, when measuring by combining a plurality of measurement units, the plurality of measurement units are configured in a state where they are overlapped vertically or horizontally. For this reason, when the ports of each measurement unit are located close to each other and a coaxial cable is already connected to the port of the measurement unit, it is physically difficult to secure a sufficient space for mounting the static eliminator. Met. And since the static elimination apparatus disclosed by patent document 2 was the structure integrated in the chassis of an apparatus, it was not able to be easily attached with respect to the existing measurement unit.

  In addition, in a measuring instrument equipped with a high-speed port in a measurement unit corresponding to measurement of a high-frequency signal, for example, a circuit board including a semiconductor element such as a hybrid IC is disposed immediately after the port in a state where it is accommodated in a metal case. The measuring instrument port and the device under test are connected by a coaxial cable. In such a measuring instrument, if there is a GND potential difference between the measuring instrument and the object to be measured, an overcurrent is generated by this GND potential difference, and the generated overcurrent is arranged immediately after the coaxial connector such as a hybrid IC. There is a risk of flowing into the semiconductor element and damaging it.

  However, in the configuration in which the static eliminator disclosed in Patent Document 2 described above is adopted in a measuring instrument such as Patent Document 1, static electricity charged on the coaxial cable can be neutralized, but after neutralization, the central conductor of the coaxial cable is Since the contact is made before the cap nut and connected to the port of the measuring instrument, a GND potential difference is generated between the measuring instrument and the object to be measured, and the hybrid IC may be damaged by the overcurrent generated by the GND potential difference. there were.

  Accordingly, the present invention has been made in view of the above problems, and provides a static elimination device and a static elimination method capable of eliminating static electricity by reducing the size of a mounting space for the electronic equipment, and also measuring the electronic equipment and the device under measurement. An object of the present invention is to provide a static eliminator and a static eliminator that can prevent damage to circuit components due to an overcurrent generated from a GND potential difference with a product.

In order to achieve the above object, a static eliminator described in claim 1 of the present invention is configured such that a port of an electronic device and an object to be measured are connected by a coaxial cable 15 to eliminate static electricity charged in the coaxial cable. In the static eliminator 1,
A base member 2 that is attached to a port of the electronic device,
A flexible rod-shaped static elimination contact 4 provided at the tip of a metal contact member which stands on the base member and comes into contact with a central conductor and an outer conductor of the coaxial connector 15a of the coaxial cable to eliminate static electricity ; It is provided with.

The static eliminator described in claim 2 is the static eliminator according to claim 1,
When the coaxial connector 15a of the coaxial cable 15 is connected to the adapter 13 of the port, the GND of the electronic device and the GND of the device under test are made the same by contacting the cap nut before the central conductor of the coaxial connector. The base member is provided with a grounding spring 5 to be potential-inserted so as to be inserted into the adapter.

The static eliminator described in claim 3 is the static eliminator according to claim 1 or 2,
One of the static elimination contacts 4 is disposed at a position where the distance from the plurality of ports of the electronic device is equal.

The static elimination method described in claim 4 is a static elimination method in which a port of an electronic device and an object to be measured are connected by a coaxial cable 15 and static electricity charged in the coaxial cable is eliminated.
A metal contact member 4a provided at the tip of a bar-shaped static elimination contact 4 standing flexibly on a base member 2 attached to a port of an electronic device is connected to a central conductor of a coaxial connector 15a of the coaxial cable and an outer conductor. The method includes the step of discharging the static electricity by bringing it into contact with a conductor.

The static elimination method described in claim 5 is the static elimination method according to claim 4,
When connecting the coaxial connector 15a of the coaxial cable 15 to the adapter 13 of the port, the grounding spring 5 provided on the base member 2 as inserted in the adapter, before the center conductor of the coaxial connector And bringing the GND of the electronic device and the GND of the object to be measured into the same potential by contacting with the cap nut.

The static elimination method described in claim 6 is the static elimination method according to claim 4 or 5,
The method includes the step of disposing one static elimination contact 4 at a position where the distance from the plurality of ports of the electronic device is equal.

  According to the present invention, the rod-shaped static elimination contact standing upright on the base member attached to the port of the electronic device is brought into contact with the central conductor and the outer conductor of the coaxial connector of the coaxial cable. In removing static electricity charged in the battery, it can be made more compact than a conventional static eliminator, and the mounting space for an electronic device can be reduced.

Further, when connecting the coaxial connector of the coaxial cable to the adapter port of the electronic device, after the grounding spring provided on the base member by inserting the adapter was initially contacted with the cap nut of the coaxial connector, the coaxial connector If the coaxial connector is connected to the adapter while maintaining the connection between the center conductor and the outer conductor, the GND of the electronic device and the GND of the object to be measured can be taken to have the same potential, and when the coaxial cable is connected, It is possible to prevent damage to the electronic device and the object to be measured due to an overcurrent generated from the GND potential difference with the object to be measured.

Furthermore, if one static elimination contact is arranged at a position where the distance from the plurality of ports of the electronic device is the same distance, the static elimination contact is shared when connecting the coaxial connector of the coaxial cable to the adapter of the port of the electronic device. The coaxial cable can be neutralized.

(A) It is a figure which shows the whole structure of the static elimination apparatus of 1st Embodiment which concerns on this invention, Comprising: It is a partial enlarged plan view at the time of attaching a static elimination apparatus to a measurement unit. (B) It is a left view of (a). (C) It is a front view of (a). It is operation | movement explanatory drawing of the static elimination method using the static elimination apparatus of 1st Embodiment which concerns on this invention. (A) It is a figure which shows the whole structure of the static elimination apparatus of 2nd Embodiment which concerns on this invention, Comprising: It is a partial enlarged plan view at the time of attaching a static elimination apparatus to a measurement unit. (B) It is a left view of (a). (C) It is a front view of (a). It is operation | movement explanatory drawing of the static elimination method using the static elimination apparatus of 2nd Embodiment which concerns on this invention. It is a figure which shows an example of the other form of the 2nd base member in the static elimination apparatus which concerns on this invention, Comprising: It is a partial expanded front view at the time of attaching a 2nd base member to a measurement unit.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  The static eliminator and the static eliminator according to the present invention are employed in electronic equipment such as measuring instruments (for example, error rate measuring apparatus, spectrum analyzer, oscilloscope, signal generator) that perform various measurements of a device under test (DUT). is there.

  The static eliminator and the static eliminator according to the present invention are particularly applicable to various measurements (for example, error detection measurement, delay measurement) of an object to be measured (DUT) using an electronic device that is difficult to employ a protection circuit and is sensitive to static electricity. , Packet loss measurement, throughput measurement, etc.) to prevent damage to the electronic device due to static electricity charged on the coaxial cable connecting the electronic device and the device under test. The object is to prevent damage to the electronic device and the measurement object due to an overcurrent generated from the GND potential difference of the measurement object.

[Configuration of measuring instrument as electronic equipment]
As described in the background art, for example, a measuring instrument as an electronic device is appropriately combined with a plurality of types of measuring units on one side of a housing equipped with an operation panel on the front depending on the measurement content of the object to be measured. It is the structure which can be mounted | worn so that attachment or detachment is possible.

More specifically, as shown in FIGS. 1 and 3, the measurement unit 11 constituting the measuring instrument includes a plurality of ports such as an input port and an output port. In the port, an adapter 13 (13A, 13B) is detachably attached to the coaxial connector 12 (12A, 12B) of the measurement unit 11 for the purpose of protecting the coaxial connector 12 . In FIGS. 1 and 3, a differential input / output type configuration in which adapters 13 (13A, 13B) are respectively attached to coaxial connectors 12 (12A, 12B) provided in two ports of the measurement unit 11 is illustrated as an example. ing.

  The adapters 13A and 13B include a cap nut 13a, a first connection portion 13b, and a second connection portion 13c. The cap nut 13a is standardized, and is tightened to a specified torque with a tool such as a torque wrench, for example, when connected to the coaxial connector 12 of the measurement unit 11. The first connecting portion 13b is formed at one end of the cap nut 13a to have a smaller diameter than the cap nut 13a, and is connected to the coaxial connector 12 at the time of measurement. The second connecting portion 13c is formed at the other end of the cap nut 13a opposite to the first connecting portion 13b with a smaller diameter than the cap nut 13a. As shown in FIGS. 15a is connected.

  Further, as shown by a dotted line in FIGS. 1 and 3, the measurement unit 11 is arranged immediately after the adapters 13A and 13B in a state in which a circuit unit 14 including a semiconductor element such as a hybrid IC is accommodated in a metal case. The measuring unit 11 of the measuring instrument and the object to be measured (not shown) are connected by the coaxial cable 15 via the adapters 13A and 13B.

  In the following embodiment, a case where the configuration and method of the present invention are applied to a measuring instrument as an electronic device will be described as an example. In particular, if the device is easily affected by static electricity charged on the coaxial cable 15. The present invention can be applied without being limited to the measuring instrument.

[Overall configuration of the static eliminator of the first embodiment]
As shown in FIG. 1, the static eliminator 1 </ b> A (1) according to the first embodiment is roughly configured to include a base member 2, a support member 3, a static elimination contact 4, a grounding spring 5, and a fixing means 6.

  The base member 2 is a member for attaching and fixing to the adapter 13 (13A, 13B) of the port (coaxial connector 12) of the measurement unit 11, and includes a first base member 2A and a second base member 2B. The first base member 2A is made of a conductive rectangular plate-shaped metal member. In the first base member 2A, an insertion hole 8 corresponding to the outer shape of the first connection portion 13b of the adapter 13 (13A, 13B) connected to the coaxial connector 12 is formed. The insertion holes 8 are formed at two symmetrical positions of the first base member 2A, and are inserted through the coaxial connectors 12 (12A, 12B) when the static eliminator 1A is attached.

  The second base member 2B is made of a rectangular plate-like metal member having electrical conductivity, like the first base member 2A, in order to share parts. The second base member 2B is formed with an insertion hole 9 corresponding to the outer shape of the second connection portion 13c of the two adapters 13 (13A, 13B). The insertion holes 9 are formed at two left and right symmetrical positions of the second base member 2B, and are inserted through the adapter 13 (13A, 13B) when the static eliminator 1A is attached.

  The support member 3 is made of a rod-shaped metal member such as a conductive prism or cylinder. A plurality of types of support members 3 are prepared in accordance with the height dimension of the adapter 13, and those that match the length dimension of the adapter 13 are selected. The support member 3 is attached and fixed to the center portion of the front surface 2a of the first base member 2A from the back surface 2b with a countersunk screw so as to be detachable and replaceable in accordance with the length dimension of the adapter 13.

  The support member 3 can also be configured integrally with the first base member 2A when the length dimension of the adapter 13 attached to the port of the measurement unit 11 is predetermined.

  The static elimination contact 4 includes a contact member 4a and a flexible support member 4b. When the static elimination device 1A is attached to the port (coaxial connector 12) of the measurement unit 11, the distance from the two ports (adapter 13A, 13B) is increased. The two ports are placed close to each other so as to be equidistant and fixed. More specifically, as shown in FIG. 1C, the static elimination contact 4 is formed from the center between the two insertion holes 9 inserted into the adapter 13 (13A, 13B) with respect to the surface 2c of the second base member 2B. It is located above a predetermined height, is substantially parallel to the adapters 13A and 13B, and is erected and fixed in close proximity.

  The contact member 4a is made of a metal member having a spherical end surface. As for the contact member 4a, the base end part which opposes a front end surface is fixed to the flexible support member 4b. The flexible support member 4b is made of a flexible metal member such as a coil spring or a leaf spring. The flexible support member 4b supports the contact member 4a with flexibility so that the contact member 4a can be displaced. One end of the flexible support member 4b is fixed to the base end portion of the contact member 4a, and the other end is attached to the first base member 2A, for example, solder. It is fixed by attaching or welding.

  In this way, the static elimination contact 4 is, for example, parallel to the two adapters 13A and 13B when the static elimination device 1A is attached to the port (adapter 13) of the measurement unit 11, and the distance from the two adapters 13A and 13B is small. The first base member 2A is erected and fixed so as to be equidistant. When the coaxial connector 15a of the coaxial cable 15 is connected to the adapter 13, the neutralizing contact 4 contacts the outer surface of the coaxial connector 15a when the central conductor and the outer conductor of the coaxial connector 15a come into contact with the front end surface of the contact member 4a. The conductor is short-circuited to remove static electricity from the coaxial cable 15.

  The ground spring 5 is made of, for example, a metal coil spring, and one end thereof is fixed to the back surface 2d of the second base member 2B through, for example, soldering or welding through the insertion holes 9 of the second base member 2B. The grounding spring 5 is interposed in the two adapters 13 (13A, 13B) when the static eliminator 1A is attached, and when the coaxial connector 15a of the coaxial cable 15 is connected to the adapter 13, it is more than the central conductor of the coaxial connector 15a. First, the cap nut is brought into contact with the GND of the measuring instrument and the GND of the object to be measured so that they are at the same potential.

  The fixing means 6 is made of, for example, a screw and attached from the center of the surface 2c of the second base member 2B, and the two adapters 13 (13A, 13B) are provided between the first base member 2A and the second base member 2B. The first base member 2 </ b> A and the second base member 2 </ b> B are fixed via the support member 3 in a state where the cap nut 13 a is sandwiched from the front-rear direction (length direction of the adapter 13).

[Attachment procedure of the static eliminator of the first embodiment]
First, the support member 3 matched with the length dimension of the adapter 13 (13A, 13B) of the measurement unit 11 is attached to the first base member 2A. Moreover, the static elimination contact 4 and the grounding spring 5 are previously attached to the 2nd base member 2B. And when attaching static elimination apparatus 1A, the adapter 13 attached to the coaxial connector 12 with which the port of the measurement unit 11 was equipped is removed. Next, the insertion hole 8 of the first base member 2A to which the support member 3 is attached is inserted into the coaxial connector 12, and the first base member 2A is attached. Next, the adapter 13 is connected to the coaxial connector 12 from the outside of the first base member 2A. Next, the insertion hole 9 of the second base member 2B is inserted into the second connection portion 13c of the adapter 13, the second connection portion 13c of the adapter 13 is inserted into the ground spring 5, and the second base member 2B is attached. Do. At this time, the second base member 2 </ b> B is pushed in until the periphery of the insertion hole 9 contacts the stepped portion of the cap nut 13 a of the adapter 13. Then, the screws as the fixing means 6 are assembled from the outside of the second base member 2B so that the cap nut 13a of the adapter 13 is sandwiched between the first base member 2A and the second base member 2B. The member 2A and the second base member 2B are fixed to the adapter 13. As a result, in the static eliminator 1A, the static elimination contact 4 is parallel to the adapter 13, for example, and the support member 3 matching the length of the adapter 13 is interposed between the first base member 2A and the second base member 2B. It is fixedly attached to the adapter 13 in the state.

[Static elimination method using the static eliminator of the first embodiment]
A static elimination method using the static eliminator 1A of the first embodiment attached as described above will be described with reference to FIG.

  As shown in FIG. 2A, the contact member 4a of the static elimination contact 4 is inserted into the cap nut of the coaxial connector 15a of the coaxial cable 15 connected to the adapter 13, and the central conductor and the outer conductor of the coaxial connector 15a are connected to the contact member. 4a is contacted. Thereby, the center conductor and the outer conductor of the coaxial connector 15a are short-circuited via the contact member 4a, and the static electricity charged in the coaxial cable 15 is removed.

  After the static electricity charged on the coaxial cable 15 is removed, the coaxial connector 15a is fitted into the adapter 13 and attached as shown in FIG. At this time, the cap nut of the coaxial connector 15a comes into contact with the ground spring 5 before the center conductor, and the GND of the measuring instrument and the GND of the object to be measured are brought into the same potential. Thereby, generation | occurrence | production of the overcurrent by the GND electric potential difference of a measuring device and a to-be-measured object is eliminated.

[Overall configuration of the static eliminator of the second embodiment]
As shown in FIG. 3, the static eliminator 1 </ b> B (1) of the second embodiment is generally configured by including a base member 2 ′, a static elimination contact 4, a grounding spring 5, and a fixing means 6.

  The static eliminator 1B according to the second embodiment differs from the static eliminator 1A according to the first embodiment in the direction in which the adapter 13 is sandwiched when being fixed to the adapter 13 (13A, 13B) of the measurement unit 11. The other configuration is substantially the same, and the same number is assigned to the substantially same configuration.

  The base member 2 'is a member for mounting and fixing to the adapter 13 (13A, 13B) of the port (coaxial connector 12) of the measurement unit 11, and includes a first base member 2C and a second base member 2D. The first base member 2C is made of a conductive plate-like metal member. The first base member 2C forms an arcuate curved surface portion 2f having a curvature along the lower outer shape of the two adapters 13 (13A, 13B) at both end portions, and is a flat surface connecting between the curved surface portions 2f. The front side edge portion of the central portion is bent at a right angle to form a bent flat portion 2g.

  2nd base member 2D consists of a plate-shaped metal member which has electroconductivity. The second base member 2D forms an arcuate curved surface portion 2h having a curvature along the outer shape of the upper side of the two adapters 13 (13A, 13B) at both end portions, and a central portion connecting the curved surface portions 2h is flat. Part 2i is formed.

  The static elimination contact 4 includes a contact member 4a and a flexible support member 4b. When the static elimination device 1A is attached to the port of the measurement unit 11, the distance from the two ports (adapter 13A, 13B) is equal. The two ports are placed close to each other and fixed upright. More specifically, as shown in FIG. 3C, the static elimination contact 4 has an adapter 13 (sandwiched between the first base member 2C and the second base member 2D with respect to the bent flat portion 2g of the first base member 2C. 13A, 13B) is located at a predetermined height above the center, is substantially parallel to the adapters 13A, 13B, and is fixed upright in close proximity.

  As for the contact member 4a, the base end part which opposes a front end surface is fixed to the flexible support member 4b. The flexible support member 4b is made of a flexible metal member such as a coil spring or a leaf spring. The flexible support member 4b supports the contact member 4a with flexibility so that the contact member 4a can be displaced. One end of the flexible support member 4b is fixed to the base end portion of the contact member 4a, and the other end is fixed to the first base member 2C, for example, solder. It is fixed by attaching or welding.

  Thus, the static elimination contact 4 is parallel to the two adapters 13A and 13B when the static elimination device 1B is attached to the port (adapter 13) of the measurement unit 11, and the distance from the two adapters 13A and 13B is equal. The first base member 2C is erected and fixed so as to have a distance. When the coaxial connector 15a of the coaxial cable 15 is connected to the adapter 13, the neutralizing contact 4 contacts the outer surface of the coaxial connector 15a when the central conductor and the outer conductor of the coaxial connector 15a come into contact with the front end surface of the contact member 4a. The conductor is short-circuited to remove static electricity from the coaxial cable 15.

  The ground spring 5 is made of, for example, a metal coil spring, and one end thereof is fixed to the second base member 2D by, for example, soldering or welding. The ground spring 5 is interposed in the two adapters 13 (13A, 13B) when the static eliminator 1B is attached. When the coaxial connector 15a of the coaxial cable 15 is connected to the adapter 13, the ground spring 5 is more than the central conductor of the coaxial connector 15a. First, the cap nut is brought into contact with the GND of the measuring instrument and the GND of the object to be measured so that they are at the same potential. The ground spring 5 may be fixed to the first base member 2C.

  The fixing means 6 is made of, for example, a screw and is attached from the flat portion 2i of the second base member 2D, and a bag of two adapters 13 (13A, 13B) between the first base member 2C and the second base member 2D. The space between the first base member 2C and the second base member 2D is fixed in a state where the nut 13a is sandwiched from above and below (the radial direction of the adapter 13).

[About the installation procedure of the static eliminator of the second embodiment]
A static elimination contact 4 is attached in advance to the first base member 2C, and a grounding spring 5 is attached in advance to the second base member 2D. And when attaching the static elimination apparatus 1B, it attaches so that the 1st base member 2C and 2nd base member 2D may be inserted | pinched from the upper and lower sides with respect to the adapter 13 attached to the coaxial connector 12 with which the port of the measurement unit 11 was equipped, The screws as the fixing means 6 are assembled from the outside of the flat portion 2i of the second base member 2D to fix the first base member 2C and the second base member 2D. Thereby, the static elimination apparatus 1B is fixed and attached to the adapter 13 in a state where the static elimination contact 4 is parallel to the adapter 13.

[Static elimination method using the static eliminator of the second embodiment]
A static elimination method using the static eliminator 1B of the second embodiment attached as described above will be described with reference to FIG.

  As shown in FIG. 4A, the contact member 4a of the static elimination contact 4 is inserted into the cap nut of the coaxial connector 15a of the coaxial cable 15, and the center conductor and the outer conductor of the coaxial connector 15a are brought into contact with the contact member 4a. Thereby, the center conductor and the outer conductor of the coaxial connector 15a are short-circuited via the contact member 4a, and the static electricity charged in the coaxial cable 15 is removed.

  Then, after removing static electricity charged in the coaxial cable 15, the coaxial connector 15 a of the coaxial cable 15 is fitted into the adapter 13 and attached as shown in FIG. At this time, the cap nut of the coaxial connector 15a comes into contact with the ground spring 5 before the center conductor, and the GND of the measuring instrument and the GND of the object to be measured are brought into the same potential. Thereby, generation | occurrence | production of the overcurrent by the GND electric potential difference of a measuring device and a to-be-measured object is eliminated.

  As described above, in the static eliminator 1 (1A, 1B) and the static eliminator of the present example, the rod-like static eliminator is fixed and fixed in a flexible manner on the base members 2 and 2 ′ attached to the adapter 13 of the measurement unit 11. The contact 4 is brought into contact with the central conductor of the coaxial connector 15a of the coaxial cable 15 and the cap nut, and static electricity charged in the coaxial cable 15 is eliminated. And the static elimination which has the softness | flexibility standing up in the axial direction of the port of a measuring instrument instead of the structure which components rotate like the conductive hinge which comprises the target area | region which contacts the center conductor of the conventional patent document 2 Since the contact 4 removes the charge by short-circuiting between the central conductor and the outer conductor of the coaxial connector 15a, the installation space for the charge removal device can be made smaller than before.

  Moreover, in the static elimination apparatus 1 (1A, 1B) and the static elimination method of this example, when connecting the coaxial connector 15a of the coaxial cable 15 to the adapter 13 of the measurement unit 11, the base members 2 and 2 ′ are inserted into the adapter 13. The grounding spring 5 provided in the first connector is first brought into contact with the cap nut of the coaxial connector 15a, and then the coaxial connector 15a is fitted into the adapter 13 while maintaining the contact between the center conductor and the outer conductor of the coaxial connector 15a. Thereby, in the process of fitting the coaxial connector 15a of the coaxial cable 15 to the adapter 13 of the measuring unit 31, the GND of the measuring instrument and the GND of the object to be measured can be made conductive to make them both at the same potential. It is possible to prevent damage to the measuring instrument and the measured object due to an overcurrent generated from the GND potential difference between the measuring instrument and the measured object at the time of connection.

  Furthermore, in the static elimination apparatus 1 (1A, 1B), the static elimination contact 4 located between the two adapters 13 (13A, 13B) has flexibility and can be freely deformed. For this reason, as shown in FIG. 2B and FIG. 4B, when connecting the coaxial connector 15a of the coaxial cable 15 to the adapter 13, the static elimination contact 4 can be pushed away with a finger to make the connection. The deterioration of workability during the insertion operation can be minimized.

  Further, as shown in FIG. 1C and FIG. 3C, if one static elimination contact 4 is arranged at a position where the distance from the two ports of the measurement unit 11 is equal, the port of the measurement unit 11 When the coaxial connector 15a of the coaxial cable 15 is connected to the same cable, the neutralization of the coaxial cable 15 can be performed by sharing one static elimination contact 4 with two ports.

  Furthermore, according to the static elimination apparatus 1B and static elimination method of 2nd Embodiment, according to the maximum diameter of the adapter 13 used, the round shape of the curved surface part 2f of the 1st base member 2C and the curved surface part 2h of 2nd base member 2D is used. By setting this, the allowable range of the outer shape of the adaptable adapter 13 can be increased.

  By the way, although each embodiment mentioned above demonstrated as a structure where the adapter 13 was attached to the coaxial connector 12 of a pair of differential input / output ports provided in the measurement unit 11 of a measuring device, it is provided in the measurement unit 11. The adapter 13 attached to the coaxial connector 12 of the port can correspond to one or more than three configurations. At this time, the formation of the insertion holes 8 and 9 and the arrangement position of the charge removal contacts 4 are appropriately set according to the number of corresponding adapters 13.

  In each of the above-described embodiments, the adapter 13 (13A, 13B) of the measuring instrument is connected to the base members 2 and 2 ′ (the first base member 2A and the second base member 2B, or the first base member 2C and the second base). The structure is sandwiched between the members 2D), but is not limited to this structure.

  For example, the base member 2 (the second base member 2B in the static eliminator 1A of the first embodiment) is made of an elastic member such as rubber, and the insertion hole 9 of the second base member 2B is formed as an adapter 13 as shown in FIG. The outer diameter of the small-diameter portion at the tip of the cap nut 13a is formed smaller than the outer diameter, and a notch 9a notched from the insertion hole 9 toward the outer peripheral edge 2e is formed.

  And when attaching the static elimination apparatus 1, the small diameter part of the cap nut 13a of the adapter 13 is inserted from the notch 9a, and the small diameter part of the cap nut 13a of the adapter 13 is press-fitted into the insertion hole 9. Accordingly, the second base member 2B is fixed to the small diameter portion of the cap nut 13a of the adapter 13 by an elastic force that tightens the small diameter portion of the cap nut 13a of the adapter 13 press-fitted into the insertion hole 9.

  According to this configuration, the first base member 2A and the support member 3 are not required, and the configuration can be simplified by reducing the number of components. Moreover, the static eliminator 1 can be attached only by the operation of press-fitting the base member 2 (second base member 2B) into the insertion nut 9 through the notch 9a into the cap nut 13a of the adapter 13. The mounting work can be simplified.

  In the case of the static eliminator 1 shown in FIG. 5, the notch 9a is inserted from the insertion hole 9 below the base member 2 or on the left and right outer peripheral edges 2e so that the base member 2 (2B) attached and fixed to the adapter 13 does not fall off. It is preferable to form toward.

  Furthermore, when achieving only the purpose of eliminating static electricity charged in the coaxial cable 15, the ground spring 5 can be omitted from the configuration of the neutralizing device 1 (1A, 1B).

  As mentioned above, although the best form of the static elimination apparatus and static elimination method which concern on this invention was demonstrated, this invention is not limited with the description and drawing by this form. That is, it is a matter of course that all other forms, examples, operation techniques, and the like made by those skilled in the art based on this form are included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 (1A, 1B) Static elimination apparatus 2,2 'Base member 2A, 2C 1st base member 2B, 2D 2nd base member 3 Support member 4 Static elimination contact 5 Grounding spring 6 Fixing means 11 Measurement unit 12 (12A, 12B) Coaxial Connector 13 (13A, 13B) Adapter 14 Circuit unit 15 Coaxial cable 15a Coaxial connector

Claims (6)

In the static eliminator (1) in which the port of the electronic device and the object to be measured are connected by the coaxial cable (15), and the static electricity charged in the coaxial cable is eliminated.
Wherein that is attached to a port of an electronic device base member (2),
A flexible rod-shaped static elimination contact provided at the tip of a metal contact member which stands on the base member and comes into contact with a central conductor and an outer conductor of the coaxial connector (15a) of the coaxial cable to eliminate static electricity. (4) a neutralization device which comprising the. When the coaxial connector (15a) of the coaxial cable (15) is connected to the adapter (13) of the port, it contacts the cap nut before the center conductor of the coaxial connector and the GND of the electronic device and the covered cable The static eliminator according to claim 1, wherein a grounding spring (5) for setting the GND of the measurement object to the same potential is provided on the base member so as to be inserted into the adapter. The neutralization apparatus according to claim 1 or 2, wherein the distance to place one of the charge eliminating contact (4) at a position equal distance from the plurality of ports of the electronic device. In the static elimination method in which the port of the electronic device and the object to be measured are connected by the coaxial cable (15), and static electricity charged in the coaxial cable is eliminated.
A metal contact member (4a) provided at the tip of a rod-shaped static elimination contact (4) standing upright with flexibility on a base member (2) attached to a port of an electronic device is connected to the coaxial connector of the coaxial cable. (15a) A step of neutralizing the static electricity by bringing it into contact with the central conductor and the outer conductor. When connecting the coaxial connector (15a) of said coaxial cable (15) A to adapter (13) of said port, grounding spring provided in the base member (2) as interposed in the adapter (5) 5. The static elimination method according to claim 4, further comprising the step of bringing the GND of the electronic device and the GND of the device under test into the same potential by contacting the cap nut before the center conductor of the coaxial connector. . 6. The static elimination method according to claim 4, further comprising the step of arranging one of the static elimination contacts (4) at a position where the distance from the plurality of ports of the electronic device is equal.

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